Title 10 and 32 refer to sections of U.S. Code. Title 10 are the laws that cover the Armed Forces, both active and reserves. Title 32 covers the National Guard. Both HPSP and HSCP fall under title 10 since neither are National Guard programs.
Title 10
Title 32
Title 10 and title 32 personnel refers to the type of orders under which National Guard members are activated. On the orders, there is a line for Authority which will list either 10 USC or 32 USC. This is basically who is funding the activation. It will show 10 USC if a soldier or airman was activated under federal authority (e.g. to go to Iraq, Afghanistan, etc.) If activated by the state (e.g. two week ADT, basic training, natural disaster, etc.), it will show 32 USC.